ClickHouse
Open-source columnar DB for real-time analytics
ClickHouse is an open-source, column-oriented database management system designed for online analytical processing (OLAP). It enables real-time generation of analytical reports from large, continuously updating datasets using SQL queries. Originally developed at Yandex in 2009, ClickHouse launched in production in 2012 and became open-sourced in 2016. In 2021, it transitioned to ClickHouse, Inc. to further commercialize and expand its technology.
The company offers a core open-source product optimized for high-speed OLAP queries and a managed cloud service called ClickHouse Cloud, which combines data warehouse capabilities with real-time responsiveness. ClickHouse serves various applications, including business intelligence, financial analytics, and machine learning. The company has gained traction among notable customers like IBM and Microsoft, supported by a strong global open-source community. ClickHouse has raised significant funding to support its growth, with a total of approximately $650 million raised across multiple funding rounds.